Load data using 200gr Partitions for the 308. Suggestions and what has worked for you. (Not interested in what you've never done)
I got 2,600 some years back in a 20" 700 with 200gr Gamekings with RL17. Data isn't right in front of me, but it was a hot topic here on the campfire about 10 years ago.
My current 308 load is 48.0 gr RL-17, under a 208gr Amax. I'm loading it long at 3.08" OAL. 2580 fps from a 20.5" barrel.
You 200gr Nosler Partition being shorter and a bit lighter, I would think RL-17 might work well for you too.